Appendix 1—figure 5. Effect of a noise current with zero mean and standard deviation 0.05 added to a single neuron in the 12AX task.

Spike train of a single neuron without noise, followed by spike train in the presence of the noise, adaptive threshold of the neuron that corresponds to the spike train with no noise (shown in blue), spike train with noise present (shown in orange), and corresponding neuron voltages over the time course of 200 ms.